CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS
Revenue, net	$ 87,822	$ 117,371	$ 153,061	$ 213,595
Cost of goods sold	53,959	64,089	93,362	118,841
Gross profit	33,863	53,282	59,699	94,754
Operating expenses
Research and development	12,645	8,073	24,381	15,505
Sales and marketing	2,377	2,158	4,851	4,061
General and administrative	9,898	8,786	19,354	16,608
Total operating expenses	24,920	19,017	48,586	36,174
Income from operations	8,943	34,265	11,113	58,580
Other income (expense)
Interest income	85	70	137	105
Interest expense	(279)	(245)	(350)	(544)
Other income (expense), net	1,581	64	554	(544)
Total other income (expense), net	1,387	(111)	341	(983)
Income before income taxes	10,330	34,154	11,454	57,597
Income tax expense	(2,296)	(5,083)	(1,300)	(8,737)
Net income	$ 8,034	$ 29,071	$ 10,154	$ 48,860
Net income per share
Net income per share basic	$ 0.41	$ 1.52	$ 0.52	$ 2.59
Net income per share diluted	$ 0.40	$ 1.43	$ 0.51	$ 2.45
Weighted average shares used to compute net income per share:
Weighted average shares used to compute net income per share: basic	19,590,164	19,081,034	19,541,478	18,840,656
Weighted average shares used to compute net income per share: Diluted	20,079,702	20,367,127	20,012,344	19,956,097